Here’s an excellent reason why you really need to be aware of your privacy settings on sites such as Facebook, and be very careful about what information you put out on Twitter. Just watch the video to see what I mean :

http://www.youtube.com/watch?v=cYVBshcN7wU&feature=player_embedded#at=162

A great video for teachers of senior students to watch to understand the public nature of the internet and why privacy settings are important.